package c4.Example18_19;

class  Animal{
    void shout() {
        System.out.println("动物叫");
    }
        public String toString(){
            return "我是一个动物类";
        }
    }
public class Example18_19 {
    public static void main(String[] args) {
        Animal animal =new Animal();
        System.out.println(animal.toString());
    }
}
